Zendesk - Zendesk is a beautiful, lightweight help-desk solution.

FeedBear - The smartest way to manage feedback from your customers

Freshdesk - Freshdesk is a cloud-based customer support software that lets you support customers through traditional channels like phone and email, social channels like Facebook and Twitter, and your own branded community

FeedbacQ - Real-time customer feedback and survey management solution.

HelpScout - Help Scout is a simple, straightforward way to provide excellent support

PaperSurvey.io - Effortless automated paper-based survey data collection